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media: v4l: Add V4L2-PIX-FMT-Y12P format

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This is a packed grey-scale image format with a depth of 12 bits per
pixel. Two consecutive pixels are packed into 3 bytes. The first 2 bytes
contain the 8 high order bits of the pixels, and the 3rd byte contains
the 4 least significants bits of each pixel, in the same order.

Add the entry in userspace API, and document it.

Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Jean-Michel Hautbois 2024-04-24 18:35:37 +03:00 committed by Hans Verkuil
parent 1bfef49741
commit 1810477630
3 changed files with 13 additions and 0 deletions
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11
Documentation/userspace-api/media/v4l/pixfmt-yuv-luma.rst
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@ -114,6 +114,17 @@ are often referred to as greyscale formats.
- ...
- ...
* .. _V4L2-PIX-FMT-Y12P:
- ``V4L2_PIX_FMT_Y12P``
- 'Y12P'
- Y'\ :sub:`0`\ [11:4]
- Y'\ :sub:`1`\ [11:4]
- Y'\ :sub:`1`\ [3:0] Y'\ :sub:`0`\ [3:0]
- ...
- ...
* .. _V4L2-PIX-FMT-Y14:
- ``V4L2_PIX_FMT_Y14``

1
drivers/media/v4l2-core/v4l2-ioctl.c
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@ -1321,6 +1321,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break;
case V4L2_PIX_FMT_IPU3_Y10: descr = "10-bit greyscale (IPU3 Packed)"; break;
case V4L2_PIX_FMT_Y12P: descr = "12-bit Greyscale (MIPI Packed)"; break;
case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break;
case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break;
case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break;

1
include/uapi/linux/videodev2.h
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@ -599,6 +599,7 @@ struct v4l2_pix_format {
#define V4L2_PIX_FMT_Y10BPACK v4l2_fourcc('Y', '1', '0', 'B') /* 10 Greyscale bit-packed */
#define V4L2_PIX_FMT_Y10P v4l2_fourcc('Y', '1', '0', 'P') /* 10 Greyscale, MIPI RAW10 packed */
#define V4L2_PIX_FMT_IPU3_Y10 v4l2_fourcc('i', 'p', '3', 'y') /* IPU3 packed 10-bit greyscale */
#define V4L2_PIX_FMT_Y12P v4l2_fourcc('Y', '1', '2', 'P') /* 12 Greyscale, MIPI RAW12 packed */
/* Palette formats */
#define V4L2_PIX_FMT_PAL8 v4l2_fourcc('P', 'A', 'L', '8') /* 8 8-bit palette */